Apparatus for forming terminal ends of coils



Dec. 14, 1948. 5 sTULL APPARATUS FOR FORMING TERMINAL ENDS FOR cons 4Sheets-Sheet 1 Filed Dec. 22, 1944 JSS'TUZL r I i I I I I ll i Q 'Q/l1948- J. 5. STULL APPARATUS FOR FORMING TERMINAL ENDS FK COILS FiledDec. 22, 1944 4 She ets-Sheet 2 Dec. 14, 1948. J. 5. STULL APPARATUS FORFORMING TERMINAL ENDS FOR COILS v, w #7 M m #3 m W H/M/A H J Vmf|\\\\\IHIH NM: Q- M 21 8 v 3. mm DIN 99 mm M w ww 9M 2 m QM d 49 w m Dec. 14,1948. J. 5. STULL I APPARATUS FOR FORMING TERMINAL ENDS FOR COILS FiledDec. 22, 1944 4 Sheets-Sheet 4 QM: N \NJ w/ 4 M M M/ L 2. W5 W m aw uni\ww an M 99 3 t W x. Vb J Q a 8 W\ 5 V\ t v R A G L 97 R, R 4 U M QM,mu, m MHIMMWM Q E W Q? l w 2 WW M w w Q 6% A iatentedDec. 14,1948 2 I2,456,223

f UNITED STATES F TATENT OFFICE APPARATUS FOR FORMING TERMINAL ENDS FCOILS 0111i 8. Stull, Chicago, Ill, ascignor to Western ElectricCompany, Incorporated, New York, N. Y.,-a corporation of New .llorkApplication December 22,1944, Serial No. 569,371

' 9 Claims. (Cl. 140-403) This invention relates to article formingappaagainst an angularly formed face on the staratus and particularly toan apparatus for forming tionary member so that when the coil is removeda terminal end of a coil. fromthe apparatus, the terminal end will bear- The invention is particularly applicable to t e ranged parallelto'and in coaxial alignment with forming ofaterminai end ofa'vacuum tubeheater the longitudinal axis of the coil. The slidable coil. Such a coilmay, for instance, comprise, and pivotal lever and the slidable shoe areactu as it comes from a coiling apparatus, a coil of ated to completethe forming and setting of the .005" diameter tungsten alloy wire, thecoil havterminal end by a single continuous movement ing an outsidediameter of anda'lengt'h of of a pivotal hand lever operativelyconnected each terminal end extending tangentially thereto. from thecoil at right angles to its longitudinal Qtherobjects and adv t es o t einve tion axis. In order to facilitate the mounting and will be apparentfrom the following detafled deconnecting of the terminal ends of thecoils into scription taken in. conjunction with the accomthe vacuum tubestructure and circuit, the tangent D yin r wme in which ends of eachcoil preferably should be preformed i 1 is a fragmentary plan'view, onan ento required formations relative to the longitudinal a ee a o anarticle fo a pa tus e axis of the coil. Due to t emicroscopicdimenbcdymg t features f the tio t e parts sions of thecoils, great difficulty is encountered thereof being Shown in theirnormal Positions;

1 h dlin formin and ivin the terminal Fi 2 is a greatly nla ed f m taryp r- Sires desl red set al ld also provfiding a desired spective v of acoil with a formed terminal d uniform formation to the ends of thecoils. 4 after removal the apparatus;

An object of this invention is to provide a Fig.3isagreatly enlargedfragmentary vertical periphery and at its inner periphery to an arborsimple, emcient and pracflcame apparatus for cross section taken on theline 3-3 of Fig. 1;

if 1 f min and settin terminal ends of 4 3- View similar 1 shOwmg an 233 5 g :bove descrified, T intermediate operative position of theapparatus In order to attain in acordance in the terminal end of theC011 is with one embodiment of the invention as applied mrmed; to theforming of one terminal end of the coil 5 is a re tly enlargedfragmentary perherembefore described, wherein the end to spective viewfrom below of a stationary coil and extend parallel to and in coaxialalignment-with terminal end supporting. positioning and the longitudinalaxis of the coil, there is provided minal end forming element; anapparatus comprising a pair of slidable jaws 6 15 a Verticalcross'sectiom Partly la in the betwe n the coil on its outer vation,taken on the 11116 of 1;

or 0 mp g re e Figs. 7, 8 and 9 are vertical cross-sections taken on thelines 'I-l, 8-8 and 9-9 of Fig. 1;

Fig. 10 is a greatly enlarged fragmentary perspective view of one of theslidable coil clamping Jaws;

Fig. 11 is a greatly enlarged fragmentary plan view showing'the coilmounted on the arbor and clamped thereto by the slidable clamping jaws;

Fig. 12 is a vertical cross section taken on the line l2-i2 of Fi 11;

Fig. 13 is a'view similar to Fig. 11 showing the carried by one of thejaws. A stationary terminal end positioning member cooperates with abending edge on the arbor to first bend the' tangent terminal end acrossthe longitudinal axis of the coil during a unitary movement of the jaws,arbor and coil, the coil first being clamped during this movement, whichis eflected by the actuation of a hand leveroperatively connected to oneof the jaws. Following this a slidable and pivotal lever carrying adepending pin, which extends perpendicularly to the partially formedterminal end, is first advanced longitudinally therealong to laterallyengage the same at a point d at th a lace e coil and then is advancedalong an Fig. 15 is a View similar to Fig 13 Showingthe arcuate path tobend the terminal end laterally about a bending edge on the stationarymember g gg g gg gg ggg g ggi ;gg*l formed and bending pin in anadvanced position;

Fig. 14 is a vertical cross-section taken on the line il-ll of Fi 13;

and into the path of an angularly formed face on F1 16 1 a Vern cal aslidable bending shoe advancing in timed rela- 11n ?8 |5 f Fig 5 crosssection taken on the 17101! to the bending P the bending S1108 thenReferring now to the drawings, and particuengaging, bending and settingthe terminal end larly to Figs. 1, 6 and 9, the numerals 20 and 2!terminal end of the coil partially formed and the ing edge 59 (Fig. 3)about which the terminal 3 indicate spaced upper and lower irregularlyshaped supporting plates, the lower plate being suitably attached by ablock 22 and a bracket end 59 is bent in the partial forming thereof tothe position shown in Figs. 13 and 14. The parbers 29 and 29, which areguided rectilinearlyat one side by the inner vertical longitudinal edgeface of the spacer bar 24, the opposite side of the Jaw member 29 beingguided and retained by fixed plates or abutments 30 and 3|. Fixed to thejaw member '29 is an arbor 34, which extends forward, as viewed in Fig.1, between aligned arcshaped cooperating jaw faces 35 and 98 formed onthe jaw members 29 and 29, respectively. The jaw member 23 is normallyurged toward the jaw member 29 by a leaf spring 31 secured at member(Figs. 1, 3 and 6).

one end to the plate 2!, with its free end engaging the left end of thejaw member (Fig. 6), the jaw member carrying 9. depending stop pin 39arranged to engage the end face of the plate 2i, thus limiting theinward movement of the jaw Journalled in the plates 29 and 2| is a pin4i of irregular crosssection having an eccentric portion 42, whichoperates in a slot 43 in the jaw member 29, the pin having an actuatoror operating handle 44 at its lower end (Fig. 9). Thus, when the handle44 is rotated 180 in a counter-clockwise direction from its positionshown in Fig. 1, where it engages a stop pin 45 and in which positionthe law member faces 35 and 36 are in their normal open position; to'theposition shown in Fig. 4, where the handle engages a stop pin 46, thejaw member 29 will be advanced toward the jaw member 29 to cause a coil49 mounted on the arbor tial forming of the terminal end 59, by themeans above described, is eifected in the following manner: While thejaw members 29 and 29 are in their normal retracted positions with thejaw faces 35 and 99 open, as shown in Figs. 1 and 3, a coil 49 isthreaded onto the arbor 34 until the tangent terminal end 99 to beformed abuts the stop fin whereupon the coil is rotated counter- 34 tobe peripherally clamped between the Jaw member faces and 36 and at itsinner periphcry to the arbor (Figs. 11 and 12). This movement of the jawmember 29 is such that, in addition to closing the jaw member faces 35and 36 about the coil 49, a bodily movement of the 'jaw .members 29 and29, arbor 34 with the clamped coil occurs for a predetermined distanceagainst the action of the spring 31 to the position shown in Figs. 4, 13and 14 to partially form a terminal end 59 of the coil in a manner to bepresently described.

Referring to Fig. 5, which illustrates, in per-- spective from below,the inner end of the fixed plate or abutment 3|, which end is arrangedadjacent the arbor 34, it will be noted that this plate is provided witha relatively thin stop fin ll tapered towards its free end and extendingtoward the arbor 94. ,The' bottom surface of the abutment 3! is relievedto provide a vertical face 52 arranged at a predetermined angle from andin the plane of the longitudinal axis. of the arbor 34, and terminatingat its inner end in a vertical bending edge 53, about which thepartially formed terminal end 50 is bent and pressed against thevertical angular face 52 during the final bending thereof, by means tobe presently described. At the juncture of the fin 5|, with the verticalend face of the relieved portion of the abutment 3i, there is formed asemi-cylindrical vertical groove 54. From its outer free end inwardly toa point clearing the rear face of the fin 5|, the arbor is substantiallysemicylindrical'in cross-sectiom'as indicated at ,51 (Fig. 3), with itsupper face in the plane of the upper faces of the slidable jaw members28 and 29. This form of the arbor 34 provides a headface, which isarranged to just clear the upper clockwise until the terminal end restsin the vertical groove 94, the coil and terminal end now assuming theposition shown in Fig. 3. Thereafter, the jaw member faces 35 and. 39are closed upon the coil 49 by rotating the handle 44 counterclockwise180' from the position shown in Fig. 1 to that of Fig. 4, whereby, inthe manner previously described, the coil is first clamped tothe arbor34 and then the jaw members 23 and 29, with the clamped coil and arbor,are moved as a unit toward the left, as viewed in Figs. 11 and 12.During this latter movement, it will be obvious that the terminal end59, which is engaged in the vertical groove 54 of the fixed plate orabutment 3|, will be bent about the edge 58 of the advancing arbor 34and abutted with the upper faces of the arbor and the Jaw member 29 tothe position shown in Figs. 13 and 14, wherein the terminal. end extendsacross and in the plane of the longitudinal axisof the coil 49. Also, inthe advance of the coil 49 with the arbor 34, the tapered end of the fin5! will readily enter between the terminal end 59 and the first completeconvolution of the coil 49 and separate the 1, 4 and 6, is a mechanismfor completing the forming and setting of the terminal end 59 partiallyformed by the means and in the manner previously described. Thismechanism comprises an irregularly shaped pivotal and slidable lever 6|mounted on the upper supporting plate 29, the lever having a slot 92 atits left end (Fig. 1), through which extends a shouldered pin .93riveted at its lower end (Fig. 6) to the plate 29 and itsupper endhaving a thumb nut 94 screwthreaded thereonto, whereby the lever mayfreely slide on the plate and pivot about the pin and at the same timebe maintained in close contact with the plate. At its right end, thelever B! is provided with a V-shaped notch 95, in which is engaged, atall times, a pin 68 riveted to a slide plate 69 mountedbetween thesupporting plates 20 and 2|, the pin also extending through a slot 10 inthe plate 29 and between the furcations oi a bifurcated hand lever Hdisposed above the lever 6i and pivoted at 12 in a' bracket 13 fixed tothe plate 20.. A leaf spring 14, having its free end bearing against thelever 8i and its opposite end held fixed in a notch- 15 in the bracket12, constantly acts to retain the V-shaped notch 95 of the lever inoperative relation with the-pin 68. The slide plate 691s guidedrectilinearly in its movements betweenrvertical edge faces of the jawmember 29 and the bar 21. Depending from a plate 16 fixed to the leftend of the lever 9| (Fig. 1) is a pin 11, the pin being of such lengththat it just clears the upper face of the jaw member 29. At its leftend, as viewed in Figs. 1 and 6. the slide plate 69 is relieved toprovide a bottom face of the law member 29 whemthe slide plate isadvanced to the position shown in Figs. 15 and a thickness that it mayfreely enter into the spacebetween the upper face of the jaw 28 and thebottom face .of the relieved portion of the fixed plate or abutment 3!,as shown in Figs. 15 and 16, in the advanced position of the slideplate, the lip 8! being relieved or notched at its upper end, as viewedin Fig. 13, to permit it to pass under the fin At its outer vertical endface, the lip ii is formed at an angle, as indicated at 82, which issimilar to the angle of the vertical face 52 of the fixed plate 3i.

The manner of clamping the coil 49 and of partially forming the terminalend" thereof by a 180 actuation of the handle 44 having been previouslydescribed, the completion of the forming and setting of the terminal endby the last described means is effected in the following manner: Asshown in Fig. 1, the hand lever "H is in its normal position and,through its operative connection with the pin 68 fixed to the slideplate alignment withthe longitudinal axis 8; the coil 49, as shown infull lines in Fig. 2. Ta remove the coil 49 from the apparatus, the handlever' H is first rocked counterclockwise to its normal position(Fig. 1) and thereafter the handle I is rcck'edclockwise 180 from itsposition shown in Fig. 4 to that of Fig. 1, whereupon the jaw memberfaces 35 and 36 are withdrawn from opposite peripheral portions of thecoil' and it is now free to be slid forward of! the arbor 34 and anothercoil clamped in position.

What is claimed is:

1. An article bending apparatus comprising movable Jaw members forgripping an article to be bent, an arbor element arranged between andmovable with said members and having a bending edge about which a freeportion of the article 69, the latter is in its fully retracted positionwith the pin abutting the right end face of the slot 10 in the fixedsupporting plate 20. Also, by the engagement of the pin 68in the notch65 of the pivotal and slidable lever iii, the latter is in its fullyretracted position with the left end face of the slot 62 thereofabutting the pin 63 carried by the fixed plate 20, the latter pinserving as a pivot about which the lever 5i rocks during its operativemovement. In a single continuous clockwise movement of the hand lever IIabout its pivot I2, the terminal end 50 is bent about the verticalbending edge 53 of the fixed plate 3| and set against the verticalangular face 52 thereof to the position shown in Figs. 15 and 16. Thefirst portion of this movement of the lever H to its position shown inFig. 4 causes a rectilinear advance of the lever 61 and the slide plate69 to the positions shown wherein the right end face of the slot 62thereof is abutting the fixed pin 63, thus completing the rectilinearadvance of the lever, the slide plate having been partially advanced.Figs. 13 and 14 illustrate, on a greatly enlarged scale, the relativepositions of the lever 6i and slide plate 69 at this point in themovement of the hand lever H. As shown in Fig, 13. the lever Si is notillustrated, but the pin l'l carried thereby is shown in its advancedposition and is laterally engaging the terminal end 50 adjacent thearbor 34. The continued clockwise movement of thehand lever 12 causes acounterclockwise movement of the lever 6! about its pivot 68, therebyadvancing the pin 11 from its full line position to its dotted outlineposition and bending the terminal end 56 about the bending edge 53 ofthe fixed plate 3! to the dotted outline position (Fig. 13). In timedrelation to this latter advance of the pin H to bend the terminal end toits latter position, the slide plate 59 has further advanced in behindthe pin to laterally engage the terminal end and bend it sharply aboutthe bending edge 53 while supported by the fin 5| and setting it againstthe vertical angular face 52 of the fixed plate or abutment 3 l as shownin Figs. 15 and 16, the lip entering the space formed in relieving theabutment 3i to provide the angular face. The terminal end 50 is nowcompletely formed and set and, upon removal from the apparatus, theterminal end will move from its set position into coaxial longitudinalis bent in one direction, an abutment engaged bysaid article portionhaving a bending edge about which said article portion is bent inanother direction, an actuator for moving one of said members to firstcause the article to be-gripped by said members and to thereafter causea unitary movement thereof toward said abutment to bend said articleportion in said one direction, and a movable bending pin for bendingsaid article'portion in said other direction.

2. An article bending apparatus comprising movable jaw members forgripping an article to be bent, an element having a bending edgeextending perpendicular to the path of movement of and movable with saidmembers for bending a free portion of tl'ie article in one direction, anabutment having a bending edge extending perpendicular to said firstbending edge for bending said article portion in another direction, anactuator for moving one of said members to first cause the article to begripped by said members and thereafter a unitary movement thereof towardsaid abutment to bend said article'portion in said one direction, and amovable bending pin for bending said article portion in said otherdirection.

3. An article bending apparatus comprising movable jaw members forgripping an article to a be bent, an element arranged between andmovable with said members and having a bending edge about which a freeportion of the article is bent in one direction, an abutment engaged bysaid article portion having a bending edge about which said articleportion is bent in another direction and a surface extending from saidbending edge against which said article portion is set in the bendingthereof about said bending edge, said surface being formed at a greaterangle than the desired angle to which said article portion is to be bentin said other direction, an actuator for moving one of said members tofirst cause the article to be gripped by said members and thereafter aunitary movement thereof toward said abutment to bend said articleporion in said one direction, a movable bending pin for laterallyengaging said article portion for partially bending the same in saidother direction, and a movable bending shoe for further bending andsetting said article portion against said surface of said abutment.

4. An apparatus for bending an uncoiled end of a coil comprising movablejaw members for clamping therebetween a coil adjacent the end ing abending edgeextending parallel to the lengitudinal axis of the coilabout which said end is bent, an abutment for initially positioning saidasses-nae 7 end, said abutment cooperating with said bendin: edge tobend said end, and an actuator for to be clamped by said members to saidarb'or and to thereafter cause a unitary movement thereof toward saidabutment to bend said end.

5. An apparatus for bending an uncoiled tangent end of a coil comprisinga pair of movable moving one of said members to first cause the coil anarbor for receiving a coil having a tangential end, one end of saidarbor being cut away toiaws for clamping therebetween a coil adjacentthe end to be bent, an arborarranged between and iixed to one of saidJaws engaging the inner periphery of the coil and having a bending edgeextending parallel to the longitudinal axis oi the coil about which saidend is bent in one direction across the longitudinal axis oi the coil,an abutment engaged by and cooperating with said bending edge to bendsaid end in said one direcward said abutment to bend said end in saidone direction, and a movable bending pin for laterally engaging said endfor bending the same in said other direction.

6. A bending apparatus for a coil comprising means for clamping a coilhaving a free tangential end in position, means for bending saidtangential end to a substantially diametral position, means movablelongitudinally of said coil for preliminarily bending said end at apoint substantially on the longitudinal axis of the coil, and meansmovable substantially} perpendicular to the axis or the coil to impart afinal bend to the end.

7. A bending apparatus for a coil comprising an arbor for receiving acoil having a tangential end, one end of said arbor being cut away toform a substantially semi-cylindrical section, means for bending saidend substantially diametrically across said sectional end of said arbor,means movable longitudinally of said coil for preliminarily bending aportion of said diametrically extending end to a position substantiallylongitudinal of the coil, and means movable substantially perpendicularto the axis of said coil tor imparting a. final bend to said portion.

8. A bending apparatus for a coil comprising iorm a substantiallysemi-cylindrical section.

means for clamping a coil to said arbor, means for bending said endsubstantially diametrically across said sectional end oi. said arbor,means movable longitudinally of said coil for preliminarily bending aportion of said diametrically extending end to a position substantiallylongitudinal of the coil, and means movable substantially perpendicularto the axis of said coil for imparting a final bend to said portion.

'9. A bending apparatus for a coil comprising an arbor for receiving acoil having a tangential end, one end. of said arbor being cut away toform a substantially semi-cylindrical section, means for separating anend convolution from the coil, means'for bending said end substantiallydiametrically across said sectional end of said arbor, means movablelongitudinally of said coil for preliminarily bending a portion of saiddiametrically extending end to a position substantially longitudinal ofthe coil, and means movable substantially perpendicular to the axis ofsaid coil for imparting a final bend to said portion.

' JOHN 8. STULL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

